Coal-washing trough.



GJE. ALLEMAN.

COAL WASHING TROUGH-. APPLICATION EILED Aue.2s, 1911.

Patented J me 4, 1918.

675/1 7 1:? film/Wm,

GRANT E. ALLEIVIAN, OF SHOEMAKERSVILLE, PENNSYLVANIA.

COAL-WASHING THOUGH.

To all whom it may concern:

Be it known that 1, GRANT E. ALLEMAN, a citizen of the United States,residing at Shoemakersville, in the county of Berks and State ofPennsylvania, have invented certain new and useful Improvements in Coal-Washing Troughs, of which the following is a specification.

This invention relates to improvements in coal washing troughs and it isintended more particularly for use in connection with a dredging or coalreclaiming device, in which the culm is drawn up from the river bed andthe coal washed from the culm s0 procured.

The invention consists of a trough rovided with a series of retardingpoo ets, whereby the water is prevented from passing through the troughtoo rapidly, and with a screen over which the coal passes while it issubjected to the washing effect of the water.

The invention is more fully described in the following specification andclearly illustrated in the accompanying drawing, in which:

Figure 1 is a plan view of my improved trough, with a portion of thescreen broken away for the purpose of better illustration.

Fig. 2 is a longitudinal sectional view, taken on the line 22 of Fig. 1.

The numeral 1 designates the two, parallel, longitudinal side members ofthe trough, while the numerals 2 and 3 designate a series ofapproximately vertical and inclined wall members respectively,alternately arranged, and the numeral 4 designates a series of basemembers. These members 2, 3 and 4 extend the full width of the trough,between the side members 1, and form a series of pockets 15, each ofwhich is provided-with an inclined and a vertical wall, and the basemembers are-each formed with a plurality of perforations 5.

Along the inner side of each wall member 1, and lying directly on thetops of the members 2 and 3, I place a strip 6, and on this strip Isecure a screen 7 extending the full inner width of the trough. Thereceiving end of the trough is indicated by the supply nozzle 20, andthe delivery end is formed with an enlarged pocket 8, provided with asuitable cover 9 and this pocket is provided with a relatively largeoutlet 10 in its bottom, from which depends a tubular member 11.

In use, the material to be washed is deposited from the nozzle 20 intothe receiving end of the trough, and the larger particles Specificationof Letters Patent.

Patented June 4:, 1918.

of coal will-ride along the uppersurface of the screen, and this end ofthe trough is raised, relatively to the discharging end, so as to securethe desired drift, the angle depending on the nature of the culmdeposited therein.

During the passage of the culm through the trough, the water will passthrough the screen, together with the refuse or smaller particles, andthese smaller particles will find their way through the perforations 5,together with a small portion of the water, while the greater portion ofthe water will pass along from one pocket to another, down the inclinedwalls and over the vertical walls, where it will pass through and washthe coal drifting along the surface of the screen, so that by the timethe coal reaches the end of the trough and is deposited in the largerpocket 8, it will be thoroughly cleansed, and will pass out through thetube 11, which may be connected to any suitable delivery device.

It is evident that the inclined walls on the rear sides of the pockets,that is, those toward the feed end of the trough, will receive anddivert the downflowing streams, the diversion being completed by theapproximately vertical walls which return the liquid upwardly throughthe screen at approximately a right angle thereto, and therefore withthe strongest impetus for separating purposes obtainable for a flow ofthe nature employed, and which impetus would be much less were theforward walls to have a sloping inclination. The discharge openings 5 ofeach pocket obviously must have a capacity to discharge substantiallyless than the total of material and liquid reaching the pocket.

This construction, whereby the water is retarded in its passage, willinsure the removal from the coal of all mud and other objectionablesoluble matter.

The cover on the pocket 8 will prevent the coal from spraying or beingthrown out of the trough.

I have shown a refuse chute, 21, attached to the side members 1 of thetrough by means of hangers 22 and extending longitudinally beneath thetrough, so that if desired, the refuse may be directed to any desiredpoint. This chute is inclined relatively to the trough, and when thetrough is placed in inclined position, this chute will always shed therefuse at a greater incline than that of the trough, to preventclogging, This chute may also be provided, as shown, With a tubularoutlet -23,'f0r connection with any suitable delivery device.

What I claim is .A owashing trough consisting of an incl'i'nedscreen-bottomed trough, pockets be low the trough, said pocketshavingfinclined rear and vertical forward Walls whose upper edges reachto the screen, said pockets having restricted"discharge-openings in thebottoms thereof, and means for feeding material suspended in liquid tothe higher end of the t ugh "In testimony whereof I afliXniy-si a ture.

Y "GRANT E. ALLE N.

: copies-ofthiiwpatent mayebe obtained :for'fiveicents each, byaddressing-the fGommissioner-of Patents,

Washington,i).:G-.?

